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THOMAS D. PARSONS, 0F BRISTOL, CONNECTICUT.

IMPRQVEMENT IN HINGES.

Specification formng part of Letters Patent No. Eg, dated March 14,1876; application filed' ctober 20, 1874.

To all whom tmay concern: 4

Be it known that I, THOMAS D. PARSONS,

of Bristol, in the county of Hartford and State' of Connecticut, haveinvented certain new and useful Improvements in Hinges, of which thefollowing is a specification:

My invention consists of a new and improved hinge, the contour of itsleaves being formed of one or more segments of a circle,

Which'circle or circles embrace both edges of the leaves, all ashereinafter described.

In the accompanying drawing, Figures 1, 2, and 3 are front views ofhinges which embody my invention, the same being represented wit-h theleaves open.

A A designate the two leaves of the hinge, and'B its hub. These may beof sheet or cust metal,.and either fast or loose joints, as may bedesired. The contour of each leaf,lexcept the edge near the hub, is inthe form ofa segment or segments of a circle. In Fig.'1 only one segmentis used in each leaf, which segment is greater than yone-half of thecircle, whereby its center is brought ywithin the body of the leaves AA, and .some little distance from the hub, but near enough to the hub sothat the circle of which the segment or segments are formed willv reachit.v In the other figures a larger number of segments are cmployed, butthe saine position of the center and circumference of each circle isretained.

' In order tofit my hinge so as to embed it within the articleto whichit is to be secured, I 'take abit or boring-tool of the same size as thecircle of which thev segments upon the leaves are formed, and with itbore to ,the depth ot' the thickness of the leaves so' many depressionsas there are segments, and corresponding therewith. If properly bored,the leaves will tit said depression'sw'ithout further fitting.

f The function o'r result of locating the cir,

cles or segments thereof inthe particular relation to the leafV of thehinge, as hereinbefore described, is now maderapparent by that the llingin of the leaves must be' completed by hand. In Fig. 2, C designates theedge of the door, and D the jamb or casing.`

A few of the advantages of my invention are, thatthe centers of thecircles of which the segments are formed coming within the body of theleaves and the circles reaching the hub, the hinge can be fitted eachleaf separately, thereby enabling the hinge to be 'rendily fitted to theedge of a door as well as to its front; also, by bringing the center ofthe circles within the body of the fleaves, and litting them incorrespondingly-shaped recesses, they are prevented from slippingedgewise in any direction. thereby making it rest very firm in thewood,and requiring only a few screws for fastening it in place.

I claim as my invention- A hinge having the entire outer portion of itsleaves formed of one 0r more segments of the same circle, and its hubconstructed to intersect the arcs formed by the opposing segments,substantially as'and for the purpose` set forth. v

v THOMAS D. PARSONS. Witnesses:

GEO. T. STEELE, l

Y JAMES SHEPARD.

